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    <title language="deu">DCC´s im Praxistest: Rückführung auf Knopfdruck</title>
    <abstract language="deu">Eine online Live-Vorführung des DCC Demonstrators zur automatisierten Erstellung und Auswertung eines maschinenlesbaren digitalen Kalibrierscheins zur metrologischen Rückführung eines Pt 100 Temperaturfühlers. &#13;
&#13;
Workflow: DCC Vorlage für Kalibrierungen nach DKD-R 5-1; DCC Middleware zur Aufnahme der auftragsbezogenen Metadaten und Einfügen aller Daten, inkl. der Messdaten, in die DCC Vorlage; Validierung des befüllten DCCs gegen das DCC-Schema; Siegelung des DCCs mit dem digitalen Akkreditierungssymbol; Übertragung an den DCC-Nutzer; nutzerseitige Verifizierung des elektronischen Siegels zur Sicherstellung von Authentizität, Integrität und Akkreditierung; direktes auslesen der Sensordaten mit Messunsicherheit basierend auf Herstellerspezifikationen; Einlesen und Auswerten des DCCs auf Knopfdruck, damit automatisierte Erstellung einer Kalibrierfunktion und entsprechende Korrektur der Sensordaten, automatisches Auslesen der temperaturabhängigen Messunsicherheit und Erweiterung um relevante Beiträge zum Erreichen der metrologischen Rückführbarkeit der Temperaturmessung; qualitätsgesicherte Konformitätsaussage des Prozesses auf Basis der so korrigierten Temperaturmesswerte und deren Unsicherheiten.</abstract>
    <identifier type="url">https://www.qi-digital.de/hauptmenue/begleitforschung/praxiswerkstaetten</identifier>
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    <author>Keerthana Nattuveettil</author>
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      <language>deu</language>
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      <value>Live Demonstration</value>
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      <value>Digitalisierung</value>
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      <value>Digitaler Kalibrierschein</value>
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      <value>Metrologische Rückführbarkeit</value>
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    <title language="eng">Digital Calibration Certificates: Transforming Efficiency and Safety in Hydrogen Refuelling Station</title>
    <abstract language="eng">Digital Certificates have emerged as a pivotal element in automation and digitalisation. This presentation highlights the added value of a digitalised metrology, its impact on the workflows on the calibration service providing and receiving side as well as their significance in enhancing the quality infrastructure. An overview of digital calibration certificates (DCC) for temperature sensors, including their structure and role in establishing trust in hydrogen refuelling stations (HRS), will be discussed. Additionally, it explores the impact of DCC on optimising efficiency in the hydrogen refuelling process.&#13;
Exploring the paradigm shift brought about by Industry 4.0, where machines possess the ability to autonomously interpret digital certificate data, leads to streamlined safety checks and reduced human intervention. We will discuss how automated verification of machine-readable certificates contributes to maintaining and elevating safety standards over human-readable certificates. Furthermore, we will take a deep dive into the application of DCCs in HRS, showcasing how they enhance operational efficiency, accuracy, and maintenance by enabling real-time monitoring and adjustment of process data.&#13;
By exploring the interdependent relationship between digital certificates, machine-readable environments, and HRS optimisation, this presentation will provide valuable insights into harnessing cutting-edge technologies to create a safer, more efficient, and technologically empowered hydrogen refuelling process.</abstract>
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    <author>Keerthana Nattuveettil</author>
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      <value>Digital Traceability</value>
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      <language>eng</language>
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      <value>QI-Digital</value>
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      <value>Hydrogen Infrastructure</value>
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    <publisherName>AMA Verband für Sensorik und Messtechnik e.V.</publisherName>
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    <title language="eng">Hydrogen safety- Dealing with Closed Spaces</title>
    <abstract language="eng">Hydrogen is under discussion as a potentially clean energy source, but its safe usage and handling in enclosed environments remains a critical challenge due to the properties of hydrogen. This work focuses on detecting and monitoring hydrogen concentration in closed spaces to improve safety by developing a sensor network-based leak detection system to prevent of the accumulation of hazardous mixtures. Furthermore, the study details the implementation of a hydrogen sensor network within a container, analysing sensor placement, data collection, and safety improvements. The findings contribute to better risk assessment and enhanced safety protocols in hydrogen storage and usage facilities.</abstract>
    <parentTitle language="eng">SMSI 2025</parentTitle>
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    <licence>Allgemeines Deutsches Urheberrecht</licence>
    <author>Keerthana Nattuveettil</author>
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      <language>eng</language>
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      <language>eng</language>
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      <value>QI-Digital</value>
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    <collection role="ddc" number="621">Angewandte Physik</collection>
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    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
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    <title language="eng">Digital approach of certification in Quality Infrastructure</title>
    <abstract language="eng">QI-Digital is a joined project aiming at digitalising Quality Infrastructure (QI) processes involving standardization, conformity assessment, accreditation, metrology, and market surveillance [1]. Federal institute of material research and testing (BAM) is working on the creation of a digital calibration certifi-cate (DCC) to achieve digital metrological traceability and conformity assessment. The utilisation of machine readable and executable DCCs in the XML format is demonstrated on an example of a tem-perature measurement at a hydrogen refueling station. The certificates will be retrieved and analysed automatically at a Process Control System or at a Digital Twin.</abstract>
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    <author>Keerthana Nattuveettil</author>
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    <title language="eng">Digital approach of certification in Quality Infrastructure</title>
    <abstract language="eng">QI-Digital is a joined project aiming at digitalising Quality Infrastructure (QI) processes involving standardization, conformity assessment, accreditation, metrology, and market surveillance [1]. Federal institute of material research and testing (BAM) is working on the creation of a digital calibration certifi-cate (DCC) to achieve digital metrological traceability and conformity assessment. The utilisation of machine readable and executable DCCs in the XML format is demonstrated on an example of a tem-perature measurement at a hydrogen refueling station. The certificates will be retrieved and analysed automatically at a Process Control System or at a Digital Twin.</abstract>
    <parentTitle language="eng">SMSI-2023-Proceedings / Chapter A3 - Metrology in the digital age</parentTitle>
    <identifier type="doi">10.5162/SMSI2023/A3.4</identifier>
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    <author>Keerthana Nattuveettil</author>
    <author>Nanine Brunner</author>
    <author>Carlo Tiebe</author>
    <author>Marcus Thomas</author>
    <author>Michael Melzer</author>
    <author>Matthias Bartholmai</author>
    <author>Sergej Johann</author>
    <author>Patrick P. Neumann</author>
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      <value>Quality Infrastructure</value>
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    <subject>
      <language>eng</language>
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      <language>eng</language>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Digitalisation</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hydrogen technology</value>
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    <collection role="ddc" number="621">Angewandte Physik</collection>
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  <doc>
    <id>55399</id>
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    <publishedYear>2022</publishedYear>
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    <title language="deu">Einsatz von Sensortechnologien an einer Wasserstofftankstelle als Beitrag zur digitalen Qualitätsinfrastruktur</title>
    <title language="eng">Use of sensor technologies at hydrogen test platform as a part of QI Digital</title>
    <abstract language="deu">Die Optimierung und Validierung des digitalen Wasserstofftankstellenmanagements mit Sensortechnologien ist das übergeordnete Ziel des Teilprojekts Digitale Qualitätsinfrastruktur mit Sensortechnologien (QIST) am Use Case H2, im Rahmen der digitalen Qualitätsinfrastruktur (QI digital[1]). Hierfür sollen u.a. Sensornetzwerke mit digital-gestützten Auswertungsstrategien intelligent gestaltet werden (Stichwort KI bzw. digitaler Zwilling). Verschiedene, sich ergänzende Sensoren, Systemkomponenten und KI-Methoden stehen als Bausteine intelligenter Sensorsysteme zur Verfügung, mit dem Zweck, die physikalischen und chemischen Parameter an und in Anlagen umfassend und effizient zu überwachen sowie Fehlfunktionen zuverlässig zu detektieren und zu interpretieren, Abbildung 1.&#13;
Konkrete Arbeitsschritte sind, nach dem Aufbau der Versuchsplattform „Wasserstofftankstelle“, die Instrumentierung von Sensorik und deren digitale Integration in das Tankstellenmanagementsystem sowie die Validierung im Realbetrieb. Die somit erzielten Messergebisse sowie die Messunsicherheiten, Historien und Verfahren werden in digitaler Form aufbereitet, gespeichert und fortlaufend in die KI-basierte Datenauswertung einbezogen, inkl. der Anbindung an die metrologische Rückführungskette.&#13;
Ziele sind:&#13;
• Einführung eines neuen messtechnischen Ansatzes und eines digitalen Zwillings für den Anwendungsfall "Wasserstofftankstelle" auf Basis der H2-Sensorik sowie der Zustandsgrößen Druck und Temperatur&#13;
• Qualitätssicherung durch Applikationen zuverlässiger Gassensorik, Manometer und Thermometer sowie KI-Methoden zur Prozesskontrolle und Detektion von Fehlfunktionen&#13;
• Nutzung von digitalen Kalibrierscheinen (DCCs) insbesondere für die Messgröße Temperatur zur Realisierung der metrologischen Rückführung in einer digitalen Qualitätsinfrastruktur</abstract>
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    <author>Keerthana Nattuveettil</author>
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    <author>Michael Melzer</author>
    <author>Sergej Johann</author>
    <author>Patrick P. Neumann</author>
    <author>Matthias Bartholmai</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>QI Digital</value>
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      <language>eng</language>
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      <value>H2Safety@BAM</value>
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      <language>deu</language>
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      <value>Wasserstoff</value>
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    <subject>
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      <value>Hydrogen</value>
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    <subject>
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      <type>uncontrolled</type>
      <value>Sensorik</value>
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    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Digitalisierung</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Digitalisation</value>
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    <publishedYear>2024</publishedYear>
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    <title language="eng">Enhanced safety by optimisingHydrogen Sensor Network</title>
    <abstract language="eng">Future Hydrogen Refuelling Stations (HRS) will be equipped with their own photovoltaic power system and electrolyser, placed in a container, for an independent local generation of green hydrogen. Focusing on public safety, there is a need for understanding the dynamics of hydrogen concentration in such an electrolyser unit. Specifically, it involves studying the behaviour of hydrogen concentration over time as it increases during release or hydrogen leak and decreases because of losses, i.e. the leak from the container to the surroundings.</abstract>
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    <author>Keerthana Nattuveettil</author>
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      <value>Sensor Network</value>
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    <subject>
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  <doc>
    <id>61867</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
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    <title language="eng">Automated generation and utilization of accredited temperature DCCs</title>
    <abstract language="eng">The accredited calibration laboratory of the German Federal Institute for Materials Research and Testing (BAM) has established verified XML digital calibration certificates for calibrations of resistance thermometers within the scope of its accreditation. Hence, all necessary information according to ISO/IEC 17025 and the DKD-R 5-1 calibration rule is provided in a machine-readable and machine-interpretable form. &#13;
For the automated DCC generation, a self-implemented middleware is compiling the metadata (i.e. customer-, order-, item- and method data) and combines it with the measured calibration data and influence conditions into a process- and lab-specific DCC template. This DCC software is able to handle both, single probe calibrations (e.g. Pt 100) as well as measurement chains (e.g. thermometers and temperature loggers) and also supports multiple item calibrations with the automated creation of individual DCC files. All generated DCCs can be readily validated against the DCC scheme (v.3.2.1).&#13;
The validated and authorized DCCs are equipped with the novel digital accreditation symbol, that was recently piloted with the German national accreditation body (DAkkS), to form `eAttestations´. This advanced electronic seal with a qualified certificate, after successful validation by the receiver, provides three basic functionalities in a DCC:&#13;
1.	Authenticity: It confirms that the issued certificate actually originates from the BAM calibration laboratory (D-K-11075-08)&#13;
2.	Integrity: It protects all the data and information in the DCC from change and manipulation&#13;
3.	Accreditation: It verifies the active accreditation status of the issuing body at the time of sealing (authorization)&#13;
Thus, this accreditation seal can fully replace an electronic signature on an accredited DCC.&#13;
In order to demonstrate the added value of DCCs also on the receiver side, the BAM DCC-team started to develop a simple but capable DCC demonstrator. For the use case of thermal process monitoring, the software reads out the metrological data of an incoming DCC, performs a linear regression of the temperature calibration values, uses the obtained calibration function to correct the raw sensor readings, extends the DCC measurement uncertainty values with further contributions (e.g. from the correction and the hysteresis) and adjusts the process-defined acceptance limits to account for the measurement uncertainty, all in real-time. Hence, it automatically utilizes a DCC to obtain metrological traceability and a quality-assured process conformity assessment, practically at the push of a button.&#13;
In the talk, the automated DCC generation in the scope of our accreditation, including the electronic sealing with the digital accreditation symbol, as well as the one-click DCC utilization with our demonstrator will be presented. &#13;
The work was performed within the national QI-Digital initiative.</abstract>
    <identifier type="url">https://www.dcc-conference-2024.ptb.de/home</identifier>
    <note>Video file from minute 28 on</note>
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    <author>Michael Melzer</author>
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    <subject>
      <language>eng</language>
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      <value>Digital Calibration Certificate</value>
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    <subject>
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    <subject>
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      <value>E-Attestation</value>
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    <subject>
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      <value>Calibration</value>
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    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
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    <title language="eng">Hydrogen safety- Dealing with Closed Spaces</title>
    <abstract language="eng">This work focuses on the detection and monitoring of hydrogen concentration in closed spaces, to improve safety by developing a sensor network-based leak detection system. This will help in prevention of accumulation of hazardous mixtures. Furthermore, the study details the implementation of a hydrogen sensor network within a container, analysing sensor placement, data collection, and safety improvements.</abstract>
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    <author>Keerthana Nattuveettil</author>
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      <value>Sensor Network</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hydrogen safety</value>
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    <title language="eng">Federal Institute for Material Research and Testing: Role in Hydrogen Safety</title>
    <abstract language="eng">An introduction to the Federal Institute for Materials Research and Testing (BAM) and its role in hydrogen safety is provided. The study further describes a hydrogen safety experiment in which the detection and monitoring of hydrogen in confined environments were investigated. A sensor network–based approach was implemented to reduce the risk of hazardous mixture formation, with focus placed on sensor placement, data collection, and the resulting safety improvements.</abstract>
    <enrichment key="eventName">Hybrid Sensor Network Open Forum 2025</enrichment>
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    <author>Keerthana Nattuveettil</author>
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    <subject>
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